This research focuses on patterns of change in the dimension stone commodity blocks quality production on previously identi ed and measured geometrical parameters of natural cracks, modelling and planning out the nal dimension of stone products and nished products based on the proposed digital photogrammetric techniques. The optimal parameters of surveying are investigated and the in uence of surveying distance to length and crack area is estimated. Rational technological parameters of dimension stone blocks production are taken into account.

The influence of primary kaolin moisture on the duration of bucket unloading is proven, and the analytical dependence for the estimation of this ratio in the form of a second-degree polynomial is obtained. Three main technological schemes for different technological conditions substantiate the procedure for evaluating the productivity of the primary kaolin excavation for cases of selective development of curvilinear sections on the basis of the first proposed technological coefficient of the contact form, which takes into account the fractal nature of the section's shape, are suggested in the article. It is first proposed to include the specific time of shifting in the working cycle of backhoe type excavators. The mathematical models of the primary kaolin excavation process on the curved face of the conditioned area with a backhoe type excavator for different varieties of the mutual arrangement of the hydraulic excavator and the hauler are developed.

Studies have been conducted with the aim of studying ways to improve the decorative properties of natural stone products. That will allow to make a nished product run of natural stone with a homogeneous tint. For this purpose, the indicators of lustre, lightness and saturation of natural surfaces of facing stone worked by mechanical and chemical methods are described. The in uence of chemical treatment on the decorative indicators of various kinds of natural facing stone depending on its mineralogical composition is determined.

This article is devoted to the conceptual development of the transition from drill and blast excavation to a non-blasting method for the preparation of hard rock before excavation at construction material deposits. The scientifi c and technical literature on the problems in the blasting of hard rock in preparation for excavation is analysed. A classifi cation of mining equipment for the non-blasting development of a rock mass for excavation has been developed, taking into account the nature of the operation of mining equipment. The concept of the transition from drill and blast excavation to nonblasting methods in the preparation of mined rock in non-metallic material quarries is presented. The research results of the parameter determination of the elements of the system for the development of non-blasting equipment at a limestone quarry are presented. The economic effi ciency of a hydraulic excavator with a ripper tooth for developing limestone with a strength of up to 30 MPa is established.

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